How severe is CVE-2021-37404?

CVE-2021-37404 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2021-37404?

CVE-2021-37404 affects the following packages: org.apache.hadoop:hadoop-common (Maven), org.apache.hadoop:hadoop-common (Maven), org.apache.hadoop:hadoop-common (Maven). Ecosystems affected: Maven.

How do I fix CVE-2021-37404?

Update org.apache.hadoop:hadoop-common to 3.3.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-37404 is resolved across your whole dependency graph.

How do I detect CVE-2021-37404 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.hadoop:hadoop-common. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate CVE-2021-37404 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2021-37404?

O3 pinpoints whether CVE-2021-37404 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is CVE-2021-37404 actively exploited in the wild?

No public exploit code has been indexed for CVE-2021-37404 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What type of vulnerability is CVE-2021-37404?

CVE-2021-37404 is classified as Out-of-bounds Write (CWE-787). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2021-37404 published, and has it been updated?

CVE-2021-37404 was published on June 13, 2022 and was last updated on July 8, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

CVE-2021-37404

CRITICAL

CVE-2021-37404 is a critical-severity (CVSS 9.8) Out-of-bounds Write vulnerability in org.apache.hadoop:hadoop-common. O3 Security confirms whether CVE-2021-37404 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Apache Hadoop heap overflow before v2.10.2, v3.2.3, v3.3.2

Also known asGHSA-rmpj-7c96-mrg8

Published

Jun 13, 2022

Updated

Jul 8, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Real-World Exposure

3 pkgs affected

☕org.apache.hadoop:hadoop-common☕org.apache.hadoop:hadoop-common☕org.apache.hadoop:hadoop-common

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

There is a potential heap buffer overflow in Apache Hadoop libhdfs native code. Opening a file path provided by user without validation may result in a denial of service or arbitrary code execution. Users should upgrade to Apache Hadoop 2.10.2, 3.2.3, 3.3.2 or higher.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.hadoop:hadoop-common`	≥ 3.3.0&&< 3.3.2	3.3.2
☕Maven	`org.apache.hadoop:hadoop-common`	≥ 3.0.0&&< 3.2.3	3.2.3
☕Maven	`org.apache.hadoop:hadoop-common`	all versions	2.10.2

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.hadoop:hadoop-common. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update org.apache.hadoop:hadoop-common to 3.3.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-37404 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2021-37404 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2021-37404. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2021-37404 in your dependencies?

O3 detects CVE-2021-37404 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works